Casascius, do you have a layered image file of this design? (xcf, psd) and a copy of the font used?
I did this in Adobe Illustrator. It is nothing more than a block of text (which I repeated with cut-n-paste) and then warped with a 1x1 mesh envelope by skewing two of the corner points.
If you load the PDF in Illustrator, it will still recognize its own objects natively, including the envelope.
The font is Ubuntu, freely available, just google "ubuntu font". It's also in the zip file of my
https://casascius.com/btcaddress.zip because it's a dependency of my note generator for Windows.
If you don't have access to Illustrator, I would be happy to make trivial changes to it and send it along. Do you have an online generator for your notes? I'm just curious to see it.
On a side note, Casascius, you are one of my bitcoin heroes because of the physical bitcoin implementations you have followed through with.
Aww, thanks. I just want to get Bitcoin in the hands of the computer illiterate and non-computer-enthusiastic, and I see this as the way to do it.